Shell脚本实现Linux回收站功能

《Shell脚本实现Linux回收站功能》要点：
本文介绍了Shell脚本实现Linux回收站功能，希望对您有用。如果有疑问，可以联系我们。

在系统运维过程中“Linux系统上常见的误操作”之首就是删除rm操作(特别是rm -rf),这些被误删的文件将无法被取回,那么是否有办法解决这个问题呢?目前有两种解决方案：

1. 第一种是如果你在误删除文件以后,若没有对硬盘做大量的IO(也就是硬盘上存放该被删除文件的设备块没被新的数据所覆盖),那么可借助一些第三方软件支持从硬盘上直接还原文件,在Linux有这方面的第三方软件,类似windows平台下的FinalData.

2. 第二种则是在你每次删除文件时,都将被删除的文件复制一份到指定的目录下,在你发现误删文件后能够从该目录下取回数据,这就相当于windows下的回收站了.

这篇文章将介绍的则是第二种解决方案,其优缺点都是非常明显的,优点是：可以确保每次删除的文件都能够找回；缺点就是：需要耗费相当一部分硬盘空间来存放被删除的文件；同时需要在每次删除文件时都必须通过这个删除脚本来处理.

下面看看这个Linux Shell脚本,既然其优缺点都非常明显,但这妨碍我们学习这种解决问题的思路……

[code lang=”shell”]
#!/bin/bash
from1=$1
from2=$2
garbage=$HOME/.garbage
mvlog=$garbage/mv.log
if [ ! -e $garbage ]
then
mkdir -p $garbage
chmod 777 $garbage
fi
function rand
{
a=(0 1 2 3 4 5 6 7 8 9 a b c d e A B C D E F )
for ((i=0;i> $mvlog
mv "$from1" "$garbage/$from1:$random"
fi
}
function more
{
for file in *
do
echo "`pwd`/:$file:$random:`date`" >> $mvlog
mv $file "$garbage/$file:$random"
done 2> /dev/null
}
function rmi
{
if [ ! -d "$from2" ]
then
echo -n "rm:remove regular empty file ‘$from2’?" ; read answer;
if [ "$answer" = ‘y’ -o "$answer" = ‘Y’ ]
then
echo "`pwd`/:$from2:$random:`date`" >> $mvlog
mv "$from2" "$garbage/$from2:$random"
fi
else
echo "rm: cannot remove directory ‘$from2’: Is a directory"
fi

}
function rmf
{
if [ ! -d "$from2" ]
then
echo "`pwd`/:$from2:$random:`date`" >> $mvlog
mv "$from2" "$garbage/$from2:$random"
else
echo "rm: cannot remove directory ‘$from2’: Is a directory"
fi
}
function rmr
{
if [ -e "$from2" ]
then
result=$(echo $from2 | sed ‘s/\///g’)
echo "`pwd`/:$result:$random:`date`" >> $mvlog
mv "$result" "$garbage/$result:$random"
fi

}
function rml
{
while :
do
clear
line=$(cat -n $mvlog | awk -F : ‘{print $1,"FileName:"$2,"Time:"$4}’)
linecount=$(cat $mvlog | wc -l)
echo -e "$line\c"
echo
echo
echo "Please input number you want revent(line count:$linecount)–exit(e)"
read answer
if [ "$answer" = e -o "$answer" = E ]
then
break
else
(
echo "please input y(sure:)"
read answer1
if [ "$answer1" = y -o "$answer" = Y ]
then
address=$(sed -n "$answer""p" $mvlog | awk -F : ‘{print $1}’)
filename=$(sed -n "$answer""p" $mvlog | awk -F : ‘{print $2}’)
filerand=$(sed -n "$answer""p" $mvlog | awk -F : ‘{print $3}’)
fullname=$address$filename
if [ -e "$fullname" ]
then
echo "The file exist!"
sleep 1
else
old="$garbage/$filename:$filerand"
new="$address$filename"
mv "$old" "$new"
delline=$( cat $mvlog | sed "$answer""d" | sort -o $mvlog)
echo "update ok!!!"
sleep 1
fi
fi
)
fi
done

}
function help
{
echo "
-i) If you wants delete some file,this function is confirm you want,the same as old rm.
-f) If you wants delete some directory,you can use this function,the same as old rm.
-r) If you wants delete some directory of file,this function can use,the same as old rm.
-l) This is new function,is you wants resume some file or directory you can use this function,
first this function can list some file in you garbage,these have some number,if you
wants resume 1,you can input 1 and then input y to confirm.
If you want add some function or some new idear please contact me…
author:wds
email:7717060@sina.com

"
}

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